![Viresh Kumar](/assets/img/avatar_default.png)
cpufreq_cooling_register() expects mask of all the CPUs where frequency constraint is applicable. This platform has more than one CPU to which these constraints will apply and so passing mask of only CPU0 wouldn't be sufficient. Also, this platform has a single cluster of CPUs and the constraint applies to all CPUs. If CPU0 is hoplugged out then we may face strange BUGs as cpu_cooling framework isn't aware of any siblings sharing clock line. Fix it by passing cpu_present_mask to cpufreq_cooling_register(). Cc: Chanwoo Choi <cw00.choi@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Amit Daniel Kachhap <amit.daniel@samsung.com> Cc: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
428 lines
11 KiB
C
428 lines
11 KiB
C
/*
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* exynos_thermal_common.c - Samsung EXYNOS common thermal file
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*
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* Copyright (C) 2013 Samsung Electronics
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* Amit Daniel Kachhap <amit.daniel@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/cpu_cooling.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/thermal.h>
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#include "exynos_thermal_common.h"
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struct exynos_thermal_zone {
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enum thermal_device_mode mode;
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struct thermal_zone_device *therm_dev;
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struct thermal_cooling_device *cool_dev[MAX_COOLING_DEVICE];
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unsigned int cool_dev_size;
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struct platform_device *exynos4_dev;
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struct thermal_sensor_conf *sensor_conf;
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bool bind;
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};
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/* Get mode callback functions for thermal zone */
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static int exynos_get_mode(struct thermal_zone_device *thermal,
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enum thermal_device_mode *mode)
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{
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struct exynos_thermal_zone *th_zone = thermal->devdata;
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if (th_zone)
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*mode = th_zone->mode;
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return 0;
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}
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/* Set mode callback functions for thermal zone */
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static int exynos_set_mode(struct thermal_zone_device *thermal,
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enum thermal_device_mode mode)
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{
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struct exynos_thermal_zone *th_zone = thermal->devdata;
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if (!th_zone) {
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dev_err(&thermal->device,
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"thermal zone not registered\n");
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return 0;
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}
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mutex_lock(&thermal->lock);
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if (mode == THERMAL_DEVICE_ENABLED &&
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!th_zone->sensor_conf->trip_data.trigger_falling)
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thermal->polling_delay = IDLE_INTERVAL;
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else
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thermal->polling_delay = 0;
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mutex_unlock(&thermal->lock);
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th_zone->mode = mode;
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thermal_zone_device_update(thermal);
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dev_dbg(th_zone->sensor_conf->dev,
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"thermal polling set for duration=%d msec\n",
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thermal->polling_delay);
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return 0;
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}
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/* Get trip type callback functions for thermal zone */
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static int exynos_get_trip_type(struct thermal_zone_device *thermal, int trip,
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enum thermal_trip_type *type)
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{
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struct exynos_thermal_zone *th_zone = thermal->devdata;
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int max_trip = th_zone->sensor_conf->trip_data.trip_count;
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int trip_type;
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if (trip < 0 || trip >= max_trip)
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return -EINVAL;
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trip_type = th_zone->sensor_conf->trip_data.trip_type[trip];
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if (trip_type == SW_TRIP)
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*type = THERMAL_TRIP_CRITICAL;
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else if (trip_type == THROTTLE_ACTIVE)
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*type = THERMAL_TRIP_ACTIVE;
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else if (trip_type == THROTTLE_PASSIVE)
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*type = THERMAL_TRIP_PASSIVE;
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else
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return -EINVAL;
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return 0;
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}
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/* Get trip temperature callback functions for thermal zone */
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static int exynos_get_trip_temp(struct thermal_zone_device *thermal, int trip,
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unsigned long *temp)
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{
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struct exynos_thermal_zone *th_zone = thermal->devdata;
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int max_trip = th_zone->sensor_conf->trip_data.trip_count;
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if (trip < 0 || trip >= max_trip)
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return -EINVAL;
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*temp = th_zone->sensor_conf->trip_data.trip_val[trip];
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/* convert the temperature into millicelsius */
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*temp = *temp * MCELSIUS;
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return 0;
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}
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/* Get critical temperature callback functions for thermal zone */
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static int exynos_get_crit_temp(struct thermal_zone_device *thermal,
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unsigned long *temp)
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{
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struct exynos_thermal_zone *th_zone = thermal->devdata;
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int max_trip = th_zone->sensor_conf->trip_data.trip_count;
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/* Get the temp of highest trip*/
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return exynos_get_trip_temp(thermal, max_trip - 1, temp);
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}
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/* Bind callback functions for thermal zone */
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static int exynos_bind(struct thermal_zone_device *thermal,
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struct thermal_cooling_device *cdev)
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{
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int ret = 0, i, tab_size, level;
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struct freq_clip_table *tab_ptr, *clip_data;
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struct exynos_thermal_zone *th_zone = thermal->devdata;
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struct thermal_sensor_conf *data = th_zone->sensor_conf;
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tab_ptr = (struct freq_clip_table *)data->cooling_data.freq_data;
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tab_size = data->cooling_data.freq_clip_count;
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if (tab_ptr == NULL || tab_size == 0)
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return 0;
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/* find the cooling device registered*/
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for (i = 0; i < th_zone->cool_dev_size; i++)
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if (cdev == th_zone->cool_dev[i])
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break;
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/* No matching cooling device */
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if (i == th_zone->cool_dev_size)
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return 0;
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/* Bind the thermal zone to the cpufreq cooling device */
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for (i = 0; i < tab_size; i++) {
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clip_data = (struct freq_clip_table *)&(tab_ptr[i]);
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level = cpufreq_cooling_get_level(0, clip_data->freq_clip_max);
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if (level == THERMAL_CSTATE_INVALID)
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return 0;
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switch (GET_ZONE(i)) {
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case MONITOR_ZONE:
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case WARN_ZONE:
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if (thermal_zone_bind_cooling_device(thermal, i, cdev,
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level, 0)) {
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dev_err(data->dev,
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"error unbinding cdev inst=%d\n", i);
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ret = -EINVAL;
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}
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th_zone->bind = true;
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break;
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default:
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ret = -EINVAL;
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}
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}
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return ret;
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}
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/* Unbind callback functions for thermal zone */
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static int exynos_unbind(struct thermal_zone_device *thermal,
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struct thermal_cooling_device *cdev)
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{
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int ret = 0, i, tab_size;
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struct exynos_thermal_zone *th_zone = thermal->devdata;
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struct thermal_sensor_conf *data = th_zone->sensor_conf;
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if (th_zone->bind == false)
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return 0;
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tab_size = data->cooling_data.freq_clip_count;
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if (tab_size == 0)
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return 0;
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/* find the cooling device registered*/
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for (i = 0; i < th_zone->cool_dev_size; i++)
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if (cdev == th_zone->cool_dev[i])
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break;
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/* No matching cooling device */
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if (i == th_zone->cool_dev_size)
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return 0;
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/* Bind the thermal zone to the cpufreq cooling device */
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for (i = 0; i < tab_size; i++) {
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switch (GET_ZONE(i)) {
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case MONITOR_ZONE:
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case WARN_ZONE:
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if (thermal_zone_unbind_cooling_device(thermal, i,
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cdev)) {
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dev_err(data->dev,
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"error unbinding cdev inst=%d\n", i);
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ret = -EINVAL;
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}
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th_zone->bind = false;
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break;
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default:
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ret = -EINVAL;
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}
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}
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return ret;
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}
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/* Get temperature callback functions for thermal zone */
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static int exynos_get_temp(struct thermal_zone_device *thermal,
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unsigned long *temp)
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{
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struct exynos_thermal_zone *th_zone = thermal->devdata;
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void *data;
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if (!th_zone->sensor_conf) {
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dev_err(&thermal->device,
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"Temperature sensor not initialised\n");
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return -EINVAL;
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}
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data = th_zone->sensor_conf->driver_data;
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*temp = th_zone->sensor_conf->read_temperature(data);
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/* convert the temperature into millicelsius */
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*temp = *temp * MCELSIUS;
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return 0;
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}
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/* Get temperature callback functions for thermal zone */
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static int exynos_set_emul_temp(struct thermal_zone_device *thermal,
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unsigned long temp)
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{
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void *data;
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int ret = -EINVAL;
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struct exynos_thermal_zone *th_zone = thermal->devdata;
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if (!th_zone->sensor_conf) {
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dev_err(&thermal->device,
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"Temperature sensor not initialised\n");
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return -EINVAL;
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}
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data = th_zone->sensor_conf->driver_data;
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if (th_zone->sensor_conf->write_emul_temp)
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ret = th_zone->sensor_conf->write_emul_temp(data, temp);
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return ret;
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}
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/* Get the temperature trend */
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static int exynos_get_trend(struct thermal_zone_device *thermal,
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int trip, enum thermal_trend *trend)
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{
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int ret;
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unsigned long trip_temp;
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ret = exynos_get_trip_temp(thermal, trip, &trip_temp);
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if (ret < 0)
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return ret;
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if (thermal->temperature >= trip_temp)
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*trend = THERMAL_TREND_RAISE_FULL;
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else
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*trend = THERMAL_TREND_DROP_FULL;
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return 0;
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}
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/* Operation callback functions for thermal zone */
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static struct thermal_zone_device_ops exynos_dev_ops = {
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.bind = exynos_bind,
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.unbind = exynos_unbind,
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.get_temp = exynos_get_temp,
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.set_emul_temp = exynos_set_emul_temp,
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.get_trend = exynos_get_trend,
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.get_mode = exynos_get_mode,
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.set_mode = exynos_set_mode,
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.get_trip_type = exynos_get_trip_type,
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.get_trip_temp = exynos_get_trip_temp,
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.get_crit_temp = exynos_get_crit_temp,
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};
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/*
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* This function may be called from interrupt based temperature sensor
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* when threshold is changed.
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*/
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void exynos_report_trigger(struct thermal_sensor_conf *conf)
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{
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unsigned int i;
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char data[10];
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char *envp[] = { data, NULL };
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struct exynos_thermal_zone *th_zone;
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if (!conf || !conf->pzone_data) {
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pr_err("Invalid temperature sensor configuration data\n");
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return;
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}
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th_zone = conf->pzone_data;
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if (th_zone->bind == false) {
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for (i = 0; i < th_zone->cool_dev_size; i++) {
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if (!th_zone->cool_dev[i])
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continue;
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exynos_bind(th_zone->therm_dev,
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th_zone->cool_dev[i]);
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}
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}
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thermal_zone_device_update(th_zone->therm_dev);
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mutex_lock(&th_zone->therm_dev->lock);
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/* Find the level for which trip happened */
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for (i = 0; i < th_zone->sensor_conf->trip_data.trip_count; i++) {
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if (th_zone->therm_dev->last_temperature <
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th_zone->sensor_conf->trip_data.trip_val[i] * MCELSIUS)
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break;
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}
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if (th_zone->mode == THERMAL_DEVICE_ENABLED &&
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!th_zone->sensor_conf->trip_data.trigger_falling) {
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if (i > 0)
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th_zone->therm_dev->polling_delay = ACTIVE_INTERVAL;
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else
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th_zone->therm_dev->polling_delay = IDLE_INTERVAL;
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}
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snprintf(data, sizeof(data), "%u", i);
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kobject_uevent_env(&th_zone->therm_dev->device.kobj, KOBJ_CHANGE, envp);
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mutex_unlock(&th_zone->therm_dev->lock);
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}
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/* Register with the in-kernel thermal management */
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int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf)
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{
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int ret;
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struct exynos_thermal_zone *th_zone;
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if (!sensor_conf || !sensor_conf->read_temperature) {
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pr_err("Temperature sensor not initialised\n");
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return -EINVAL;
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}
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th_zone = devm_kzalloc(sensor_conf->dev,
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sizeof(struct exynos_thermal_zone), GFP_KERNEL);
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if (!th_zone)
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return -ENOMEM;
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th_zone->sensor_conf = sensor_conf;
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/*
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* TODO: 1) Handle multiple cooling devices in a thermal zone
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* 2) Add a flag/name in cooling info to map to specific
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* sensor
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*/
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if (sensor_conf->cooling_data.freq_clip_count > 0) {
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th_zone->cool_dev[th_zone->cool_dev_size] =
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cpufreq_cooling_register(cpu_present_mask);
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if (IS_ERR(th_zone->cool_dev[th_zone->cool_dev_size])) {
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ret = PTR_ERR(th_zone->cool_dev[th_zone->cool_dev_size]);
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if (ret != -EPROBE_DEFER)
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dev_err(sensor_conf->dev,
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"Failed to register cpufreq cooling device: %d\n",
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ret);
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goto err_unregister;
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}
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th_zone->cool_dev_size++;
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}
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th_zone->therm_dev = thermal_zone_device_register(
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sensor_conf->name, sensor_conf->trip_data.trip_count,
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0, th_zone, &exynos_dev_ops, NULL, 0,
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sensor_conf->trip_data.trigger_falling ? 0 :
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IDLE_INTERVAL);
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if (IS_ERR(th_zone->therm_dev)) {
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dev_err(sensor_conf->dev,
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"Failed to register thermal zone device\n");
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ret = PTR_ERR(th_zone->therm_dev);
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goto err_unregister;
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}
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th_zone->mode = THERMAL_DEVICE_ENABLED;
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sensor_conf->pzone_data = th_zone;
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dev_info(sensor_conf->dev,
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"Exynos: Thermal zone(%s) registered\n", sensor_conf->name);
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return 0;
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err_unregister:
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exynos_unregister_thermal(sensor_conf);
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return ret;
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}
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/* Un-Register with the in-kernel thermal management */
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void exynos_unregister_thermal(struct thermal_sensor_conf *sensor_conf)
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{
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int i;
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struct exynos_thermal_zone *th_zone;
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if (!sensor_conf || !sensor_conf->pzone_data) {
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pr_err("Invalid temperature sensor configuration data\n");
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return;
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}
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th_zone = sensor_conf->pzone_data;
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thermal_zone_device_unregister(th_zone->therm_dev);
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for (i = 0; i < th_zone->cool_dev_size; ++i)
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cpufreq_cooling_unregister(th_zone->cool_dev[i]);
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dev_info(sensor_conf->dev,
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"Exynos: Kernel Thermal management unregistered\n");
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}
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